Several Error with Implementing of Threads in QT [C++] - c++

Question

I'm new to implementing Threads in QT and even after reading the Documentation several times and watching Videos, I get some Error which not even Google can help me with.
thread.cpp:14: error: C2440: "Initialisierung": "QFuture" kann nicht in "QFuture" konvertiert werden
Error Codes are in German, tried to change QT Language, but didn't change the Language of the Errors. I can translate them if needed.
It seems the Error happens in this QFuture<int> future = QtConcurrent::run(&Thread::GenerateTable); command, even thought I wrote it 1:1 like from the QT Documentation.
Here is the Code I want to put in a Thread, as you can see it's writing a bit bunch of Numbers into a File, which takes around a Minute.
Thread.h
#ifndef THREAD_H
#define THREAD_H
#include <QObject>
#include <QFuture>
#include <QtConcurrent/QtConcurrent>
class Thread : public QObject
{
Q_OBJECT
public:
explicit Thread(QObject *parent = nullptr);
static bool start();
private:
int GenerateTable();
};
#endif // THREAD_H
Thread.cpp
#include "thread.h"
Thread::Thread(QObject *parent) : QObject(parent)
{
}
bool Thread::start()
{
QFuture<int> future = QtConcurrent::run(&Thread::GenerateTable);
if (future.result() == 0){
return true;
}
else
return false;
}
int Thread::GenerateTable(){
QString Path = QDir::currentPath();
QFile file(Path + "/Table.csv");
if (!file.open(QFile::WriteOnly | QFile::Text)){
return -1;
}
else{
QTextStream stream(&file);
constexpr uint64_t upper = 10'000'000;
QVector<uint64_t> rando(upper);
std::iota(rando.begin(), rando.end(), 1);
std::shuffle(rando.begin(), rando.end(),
std::mt19937(std::random_device{}()));
for (uint32_t i = 0; i < 10'000'000; ++i) {
stream << rando[i] << ',' << '\n';
}
return 0;
}
}

Answer 1

Thread::GenerateTable() is a member function. It needs an object to work on. You are calling it (er .. passing it to QtConcurrent::run()) from the (static) Thread::start() and there's no Thread object to speak of.
Although you've tagged Qt6, I'll point at the Qt5 documentation for calling member functions: you can pass an object (pointer) which you'll need to allocate from somewhere.